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The main board is located on the backside of the
refrigerator behind a cover above the machine
compartment. The main board contains all the
logic for refrigerator operation based on the
selection or modes selected from the dispenser
board.
Main Control Board Diagnosing
The main board has a green LED which blinks
during normal operation. If the LED is not on,
verify proper voltage is going to the board. A
shorted component may create the appearance
that the main board has failed. If proper voltage
is present to the board, disconnect all DC loads
from the board and cycle power using the master
switch to see if the green LED returns. If the
green LED does return, do not replace the main
board but isolate the failed component.
J19 pin 3 (
brown
) to J7 pin 9 (
orange
): 120 VAC
Main Board Removal
1. Disconnect power to the refrigerator.
2. Remove the main board cover by removing
eight 1/4 in. hex-head screws.
3. Disconnect the harness connections on the
board.
4. Squeeze four retaining pins to release the
board from the enclosure.
Main Board
